What is loader.io used for?

loader.io is a free cloud load testing service from SendGrid that stress tests web apps and APIs with thousands of concurrent connections. It is a good fit for stress testing a web app before launch and load tests in deployment pipelines.

Yes. loader.io has a free plan, and paid plans start at $99.95 per month.

Is loader.io open source?

No. loader.io is proprietary (closed-source) software and can't be self-hosted. Open-source alternatives to loader.io include k6, Locust and Artillery.

What are some alternatives to loader.io?

loader.io competes with BlazeMeter and OpenText LoadRunner. For open-source options, see Enlisted's ranked list of open-source loader.io alternatives.

loader.io: features, pricing and alternatives

About loader.io

loader.io is a cloud-based load testing service for web applications and APIs. It simulates large numbers of concurrent connections against a target host so developers can see how an app or endpoint behaves under heavy traffic, without setting up their own load-generation machines.

Setup consists of registering a target host through the web interface or API, running a test for a set duration, and watching results live as it runs. Result graphs and statistics can be shared with teammates, and the API allows load tests to be built into deployment routines. The site advertises a free tier and lists plans and pricing, and it is operated under SendGrid Labs.

Key features

Cloud-based load testing with concurrent connections
Real-time test monitoring
Shareable result graphs and statistics
Web interface and API for running tests
Target host registration for apps

Good fit for

→Stress testing a web app before launch
→Load tests in deployment pipelines

Tags: load-testing; stress-testing; api-testing; cloud-testing; performance; sendgrid; proprietary

loader.io: questions and answers

What is loader.io used for?: loader.io is a free cloud load testing service from SendGrid that stress tests web apps and APIs with thousands of concurrent connections. It is a good fit for stress testing a web app before launch and load tests in deployment pipelines.
Is loader.io free?: Yes. loader.io has a free plan, and paid plans start at $99.95 per month.
Is loader.io open source?: No. loader.io is proprietary (closed-source) software and can't be self-hosted. Open-source alternatives to loader.io include k6, Locust and Artillery.
What are some alternatives to loader.io?: loader.io competes with BlazeMeter and OpenText LoadRunner. For open-source options, see Enlisted's ranked list of open-source loader.io alternatives.